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MdeModulePkg/BootGraphicsResourceTableDxe: don't allocate below 4 GB 

The BGRT table has an 8 byte field for the memory address of the image
data, and yet the driver explicitly allocates below 4 GB. This results
in an ASSERT() on systems that do not have any memory below 4 GB to begin
with.

Since neither the PI, the UEFI or the ACPI spec contain any mention of
why this data should reside below 4 GB, replace the allocation call
with an ordinary AllocatePages() call.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>
This commit is contained in:
Ard Biesheuvel 2017-03-19 17:19:48 +00:00
parent f859c6796f
commit 09da110819
1 changed files with 3 additions and 38 deletions
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41
MdeModulePkg/Universal/Acpi/BootGraphicsResourceTableDxe/BootGraphicsResourceTableDxe.c
View File

@ -226,43 +226,6 @@ BgrtAcpiTableChecksum (
Buffer[ChecksumOffset] = CalculateCheckSum8 (Buffer, Size);
}
/**
Allocate EfiBootServicesData below 4G memory address.
This function allocates EfiBootServicesData below 4G memory address.
@param[in] Size Size of memory to allocate.
@return Allocated address for output.
**/
VOID *
BgrtAllocateBsDataMemoryBelow4G (
IN UINTN Size
)
{
UINTN Pages;
EFI_PHYSICAL_ADDRESS Address;
EFI_STATUS Status;
VOID *Buffer;
Pages = EFI_SIZE_TO_PAGES (Size);
Address = 0xffffffff;
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiBootServicesData,
Pages,
&Address
);
ASSERT_EFI_ERROR (Status);
Buffer = (VOID *) (UINTN) Address;
ZeroMem (Buffer, Size);
return Buffer;
}
/**
Install Boot Graphics Resource Table to ACPI table.
@ -358,11 +321,13 @@ InstallBootGraphicsResourceTable (
// The image should be stored in EfiBootServicesData, allowing the system to reclaim the memory
//
BmpSize = (mLogoWidth * 3 + PaddingSize) * mLogoHeight + sizeof (BMP_IMAGE_HEADER);
ImageBuffer = BgrtAllocateBsDataMemoryBelow4G (BmpSize);
ImageBuffer = AllocatePages (EFI_SIZE_TO_PAGES (BmpSize));
if (ImageBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
ZeroMem (ImageBuffer, BmpSize);
mBmpImageHeaderTemplate.Size = (UINT32) BmpSize;
mBmpImageHeaderTemplate.ImageSize = (UINT32) BmpSize - sizeof (BMP_IMAGE_HEADER);
mBmpImageHeaderTemplate.PixelWidth = (UINT32) mLogoWidth;